.bar{
	width:100%;
	margin:0 auto 20px;
	background:#F2F2F1;
	position:fixed;
	top:0;
	left:0;
	z-index: 50;
	.nav{
		width:1000px;
		margin:auto;
		height:50px;
		line-height: 50px;
		.one{
			height:48px;
			border-bottom: 2px solid #2F9B34;
		}
		.nav-child{
			float:left;
			margin:0 20px;
			a{
				color:#333;
				text-decoration: none;
			}
		}
		.info{
			font-size: 12px;
			float:right;
			margin-right: 20px;
			a{
				text-decoration: none;
				color:#333;
			}
			.admin,
			.login,
			.register{
				margin-right: 10px;
			}
			.back{
				@include inline-block;
				width: 14px;
				height: 15px;
				background-image:url(http://static.wenku.bdimg.com/static/ydcommon/pkg/pkg_ydcommon_base_z_1d2ce77.png);
				background-position: -346px -298px;
			}
		}
	}
}